US20040055422A1

US20040055422A1 - Easy-to-assemble ratcheting tool

Info

Publication number: US20040055422A1
Application number: US10/317,497
Authority: US
Inventors: Yen-Wen Lin
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-05
Filing date: 2002-12-12
Publication date: 2004-03-25
Also published as: DE10334111B4; TWI245684B; DE10334111A1; US7178429B2

Abstract

A ratcheting tool includes a handle and a head extending from the handle. The handle includes a compartment communicated with a hole of the head. A drive member is rotatably mounted in the hole of the head and includes teeth on an outer periphery thereof. A pawl is slidably mounted in the compartment of the handle. The pawl includes teeth on a side thereof for engaging with the teeth of the drive member. An anchor is mounted in the compartment of the head. An elastic element is attached between the pawl and the anchor for biasing the teeth of the pawl to engage with the teeth of the drive member. A protruded portion is integrally formed on a wall defining the compartment of the handle for positioning the anchor in place, thereby preventing the anchor from moving out of the compartment of the handle.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a ratcheting tool. In particular, the present invention relates to a ratcheting tool that is easy to assemble.

2. Description of the Related Art

Taiwan Patent Publication No. 335750 discloses a ratcheting wrench comprising a handle and a head on an end of the handle. The head includes a hole for rotatably receiving a drive member. A compartment is defined in a periphery defining the hole of the head, and a pawl is received in the compartment. A wall defining the compartment includes two positioning holes for engaging with two protrusions on an anchor received in the compartment. A spring has a first end received in a receptacle in the anchor and a second end attached to a side of the pawl. The pawl has a toothed face for reengaging with teeth of the drive member. Thus, when the handle turns freely in a direction without driving a fastener that is engaged with the drive member, the pawl is moved toward the anchor and compresses the spring that returns the pawl to a position for engaging with the drive member. However, positioning of the anchor is not easy, and the wall defining the compartment is the only place for positioning the anchor. Further, an end cover is required to prevent disengagement of the anchor. Further, the torque-bearing capacity of the ratcheting wrench is reduced. In an extreme case, the end cover flies away from the head of the handle if the torque transmitted to the anchor is considerably high. Further, the time for manufacturing and assembling the ratcheting wrench is long, resulting a high cost. Moreover, the anchor could not be used with a ratcheting wrench having a closed compartment.

Taiwan Patent Publication No. 431260 discloses a ratcheting wrench comprising a handle and a head on an end of the handle. The head includes a hole for rotatably receiving a drive member. A compartment is defined in a periphery defining the hole of the head, and a pawl is received in the compartment. An anchor is mounted in compartment and includes a fulcrum in contact with a wall defining the compartment. The anchor further includes a pair of protrusions on an end thereof for alternately engaging with teeth of the drive member. Thus, the anchor sways but does not slide in the compartment. A spring is attached between the other end of the anchor and a side of the pawl. The pawl has a toothed face for engaging with the teeth of the drive member. Thus, when the handle turns idly, the pawl is moved toward the anchor and compresses the spring that returns the pawl to a position for engaging with the drive member. However, the pair of protrusions of the anchor alternately engaged with the teeth of the drive member during idle rotation of the handle cause wear to the teeth of the drive member. Further, the anchor risks getting stuck in the compartment during idle rotation of the handle, as there is no means for limiting movement of the anchor in the compartment when the anchor is subject to a force from the pawl. Further, the location of the anchor affects operation of the wrench. More specifically, if the swayable anchor is adjacent to the drive member, the swaying angle for the anchor could be too small, and if the swayable anchor is distal to the drive member, the swaying angle for the anchor could be too large. This increases difficulty in assembly of the ratcheting wrench of this type. Further, when the handle is subject to vibrations and/or hammering, the anchor may move to a position not allowing swaying movement of the anchor.

FIGS. 1 and 2 of the drawings illustrate a conventional ratcheting tool comprising a handle 1 and a head on an end of the handle. The head includes a hole for rotatably receiving a drive member 2. A compartment 9 is defined in a periphery defining the hole of the head, and a pawl 3 is received in the compartment 9. An anchor 4 is mounted in compartment 9 and includes a transverse hole 8. A spring 6 is attached between the anchor 4 and the pawl 3. The handle 1 further includes a transverse hole 7 communicated with the compartment 9. In assembly, a pin 5 is extended through the transverse hole 7 of the handle 1 and the transverse hole 8 of the anchor 4 to thereby position the anchor 4. However, troublesome drilling of holes is required. Further, the assembling procedure is troublesome, as the transverse hole 8 of the anchor 4 must be aligned with the transverse hole 7 of the handle 1 before inserting the pin 5.

SUMMARY OF THE INVENTION

An object of the present invention is to provide ratcheting tool that is easy to assemble.

A ratcheting tool in accordance with the present invention comprises a handle and a head extending from the handle. The head includes a hole, and the handle includes a compartment communicated with the hole of the head. A drive member is rotatably mounted in the hole of the head and includes a plurality of teeth on an outer periphery thereof. A pawl is slidably mounted in the compartment of the handle. The pawl includes a plurality of teeth on a side thereof for engaging with the teeth of the drive member. An anchor is mounted in the compartment of the head. An elastic element is attached between the pawl and the anchor for biasing the teeth of the pawl to engage with the teeth of the drive member. A protruded portion is integrally formed on a wall defining the compartment of the handle for positioning the anchor in place, thereby preventing the anchor from moving out of the compartment of the handle.

Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. [0009]

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded perspective view of a conventional ratcheting tool. [0010]
FIG. 2 is a sectional view of the conventional ratcheting tool in FIG. 1. [0011]
FIG. 3 is a perspective view of a first embodiment of a ratcheting tool in accordance with the present invention. [0012]
FIG. 4 is an exploded perspective view of the ratcheting tool in FIG. 3. [0013]
FIG. 5 is a sectional view illustrating formation of a protruded portion in the ratcheting tool in accordance with the present invention. [0014]
FIG. 6 is a sectional view illustrating mounting of an anchor of the ratcheting tool in accordance with the present invention. [0015]
FIG. 7 is a sectional view taken along plane [0016] 7-7 in FIG. 3.
FIG. 8 is a sectional view taken along plane [0017] 8-8 in FIG. 7.
FIG. 9 is a sectional view similar to FIG. 7, illustrating sticking prevention of the ratcheting tool in accordance with the present invention. [0018]
FIG. 10 is an exploded perspective view of a second embodiment of the ratcheting tool in accordance with the present invention. [0019]
FIG. 11 is a sectional view illustrating mounting of an anchor of the ratcheting tool in FIG. 10. [0020]
FIG. 12 is another sectional view of the ratcheting tool in FIG. 10. [0021]
FIG. 13 is an exploded perspective view of a third embodiment of the ratcheting tool in accordance with the present invention. [0022]
FIG. 14 is a sectional view illustrating mounting of an anchor of the ratcheting tool in FIG. 13. [0023]
FIG. 15 is another sectional view of the ratcheting tool in FIG. 13. [0024]
FIG. 16 is a sectional view similar to FIG. 7, illustrating a fourth embodiment of the invention. [0025]
FIG. 17 is a sectional view similar to FIG. 7, illustrating a fifth embodiment of the invention. [0026]
FIG. 18 is a sectional view similar to FIG. 7, illustrating a sixth embodiment of the invention.[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIGS. 3 and 4, a first embodiment of a ratcheting tool in accordance with the present invention generally comprises a [0028] handle 10 and a head 11 extending from the handle 10. The head 11 includes a hole 12, with an annular ledge 121 formed on a lower end of a periphery defining the hole 12 and with an annular groove 122 defined in an upper end of the periphery defining the hole 12. The handle 10 includes a compartment 13 communicated with the hole 12 of the head 11. As illustrated in FIG. 5, a protruded portion 14 is integrally formed on a top wall 16 defining the compartment 13 by using a punch 60.
A drive member [0029] 40 (e.g., a gear wheel in this embodiment) is rotatably mounted in the hole 12 of the head 11. In this embodiment, the drive member 40 includes an outer periphery, with an annular groove 42 defined in an upper portion of the outer periphery, with an annular recessed portion 43 formed on a lower portion of the outer periphery, and with a plurality of teeth 41 formed between the upper portion and the lower portion of the outer periphery of the drive member 40. The drive member 40 further has an inner periphery 44 for engaging with a fastener such as a bolt head, nut, etc. A C-clip 45 is partially received in the annular groove 42 of the drive member 40 and partially received in the annular groove 122 of the head 11. Thus, the drive member 40 is rotatably mounted in the hole 12 of the head 11. The annular recessed portion 43 of the drive member 40 rests on the annular ledge 121 of the head 11 to thereby prevent the drive member 40 from falling out of the hole 12 of the head 11 not shown in FIG. 8.
An [0030] anchor 20 is mounted in the compartment 13 of the handle 10. The anchor 20 includes a peg 21 on a face thereof. As illustrated in FIG. 6, the anchor 20 is inserted into the compartment 13 of the handle 10 and slid to a position between the protruded portion 14 and a lateral wall 17 defining the compartment 13 of the handle 10. Thus, a front side of the anchor 20 is stopped by the protruded portion 14, and a rear side of the anchor 20 is stopped by the lateral wall 17 defining the compartment 13 of the handle 10. Namely, the anchor 20 is securely sandwiched between the protruded portion 14 and the lateral wall 17 defining the compartment 13 of the handle 10. Movement of the anchor 20 out of the compartment 13 of the handle 10 is thus prevented. Namely, further upward movement of the anchor 20 is prevented.
A [0031] pawl 30 is slidably mounted in the compartment 13 of the handle 10. The pawl 30 includes a side having a plurality of teeth 31 for engaging with the teeth 41 of the drive member 40. The pawl 30 further includes a portion 32 (FIG. 7) pressing against the lateral wall 17 defining the compartment 13 of the handle 10. Further, the pawl 30 includes an end 34 having a peg 33 formed thereon. As illustrated in FIG. 7, an elastic element 50 is attached between the peg 33 of the pawl 30 and the peg 21 of the anchor 20, thereby biasing the teeth 31 of the pawl 30 to engage with the teeth 41 of the drive member 40. Operation of the ratcheting tool is conventional and therefore not described.
As illustrated in FIGS. 7 and 8, since the [0032] anchor 20 is stopped by the protrusion 14 and the lateral wall 17 defining the compartment 13 of the handle 10 and since an end of the elastic element 50 is attached to the peg 21 of the anchor 20, the anchor 20 would not move to a position outside the compartment 13 of the handle 10. Thus, the anchor 20 would not come into contact with the teeth 41 of the drive member 40, thereby preventing damage to the teeth 41 of the drive member 40 during operation of the ratcheting tool. Further, none of the handle 10 and the anchor 20 requires a drilling procedure for forming a hole required in the conventional ratcheting tool in FIGS. 1 and 2. The surface of the handle 10 is neat, and-the cost is saved. Further, tolerances of the elements of the ratcheting tools become unimportant due to the way the anchor 20 is mounted. The ratcheting tool in accordance with the present invention is thus more reliable when compared with conventional designs.
FIG. 9 illustrates sticking prevention provided by the [0033] anchor 20. If the pawl 30 rusts and is thus stuck on the drive member 40, when the handle 10 is turned, e.g., clockwise, the pawl 30 moves together with the drive member 40 until the peg 33 of the pawl 30 impinges the peg 21 of the anchor 20. Further movement of the pawl 30 is stopped, and the pawl 30 disengages from the drive member 40 that keeps on its rotational movement. Thus, the pawl 30 moves to a position shown by the phantom lines in FIG. 9. Namely, the sticking problem of the pawl 30 is solved.
FIGS. 10 through 12 illustrate a second embodiment of the ratcheting tool in accordance with the present invention, wherein the protruded portion (now designated by [0034] 15) is integrally formed on a bottom wall 18 defining the compartment 13 of the handle 10. Further, the anchor (now designated by 20′) includes a peg 21′ on a side thereof and a groove 22′ on an underside thereof. FIG. 11 illustrates how the anchor 20′ is mounted into the compartment 13 of the handle 10. The anchor 20′ is slid into its position with the protruded portion 15 being engaged with the groove 22′ of the anchor 20′. The anchor 20′ is prevented from moving out of the compartment 13 of the handle 10 by the protruded portion 15. Namely, further upward movement (see FIG. 11) of the anchor 20′ is prevented. Thus, the anchor 20′ would not move out of the compartment 13 of the handle 10 and thus would not come into contact with the teeth 41 of the drive member 40, thereby preventing damage to the teeth 41 of the drive member 40.
FIGS. 13 through 15 illustrate a third embodiment of the ratcheting tool in accordance with the present invention, wherein the protruded portion (now designated by [0035] 15) is integrally formed on the top wall 16 defining the compartment 13 of the handle 10. Further, the anchor (now designated by 20″) includes a peg 21″ on a side thereof and a groove 22″ on a top side thereof. FIG. 14 illustrates how the anchor 20″ is mounted into the compartment 13 of the handle 10. The anchor 20″ is slid into its position with the protruded portion 15 being engaged with the groove 22″ of the anchor 20″. The anchor 20″ is prevented from moving out of the compartment 13 of the handle 10 by the protruded portion 15. Namely, further upward movement (see FIG. 14) of the anchor 20″ is prevented. Thus, the anchor 20″ would not move out of the compartment 13 of the handle 10 and thus would not come into contact with the teeth 41 of the drive member 40, thereby preventing damage to the teeth 41 of the drive member 40.
It is noted that the protruded [0036] portion 14 of the first embodiment is formed on an end edge of the top wall 16 defining the compartment 13 of the handle 10, the protruded portion 15 of the second embodiment is formed on an intermediate portion of the bottom wall 18 defining the compartment 13 of the handle 10, and the protruded portion 15 of the third embodiment is formed on an intermediate portion of the top wall 16 defining the compartment 13 of the handle 10. All of these arrangements prevent the anchor 20, 20′, 20″ from moving out of the compartment 13 of the handle 10, thereby preventing the anchor 20, 20′, 20″ from coming into contact with the teeth 41 of the drive member 40. Thus, damage to the teeth 41 of the drive member 40 by the anchor 20, 20′, 20″ is prevented.
FIG. 16 illustrates a fourth embodiment of the invention, wherein the [0037] anchor 20 includes a peg 25, the pawl 30 includes a receptacle 35. An end of the elastic element 50 is attached to the peg 25 of the anchor 20, and the other end of the elastic element 50 is mounted in the receptacle 35 of the pawl 30.
FIG. 17 illustrates a fifth embodiment of the invention, wherein the [0038] anchor 20 includes a receptacle 26, the pawl 30 includes a peg 36. An end of the elastic element 50 is mounted in the receptacle 26 of the anchor 20, and the other end of the elastic element 50 is attached to the peg 36 of the pawl 30.
FIG. 18 illustrates a fourth embodiment of the invention, wherein the [0039] anchor 20 includes a receptacle 27, the pawl 30 includes a receptacle 37. An end of the elastic element 50 is mounted in the receptacle 27 of the anchor 20, and the other end of the elastic element 50 is mounted in the receptacle 37 of the pawl 30.
Although the invention has been explained in relation to its preferred embodiments, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the invention as hereinafter claimed. [0040]

Claims

What is claimed is:

1. A ratcheting tool comprising:

a handle;

a head extending from the handle, the head including a hole, the handle including a compartment communicated with the hole of the head;

a drive member rotatably mounted in the hole of the head, the drive member including a plurality of teeth on an outer periphery thereof;

a pawl slidably mounted in the compartment of the handle, the pawl including a plurality of teeth on a side thereof for engaging with the teeth of the drive member;

an anchor mounted in the compartment of the head;

an elastic element attached between the pawl and the anchor for biasing the teeth of the pawl to engage with the teeth of the drive member; and

a protruded portion integrally formed on a wall defining the compartment of the handle for positioning the anchor in place, thereby preventing the anchor from moving out of the compartment of the handle.

2. The ratcheting tool as claimed in claim 1, with the anchor including a peg, with the pawl including a peg, and with two ends of the elastic element attached between the peg of the anchor and the peg of the pawl.

3. The ratcheting tool as claimed in claim 1, wherein the protruded portion is integrally formed on a top wall defining the compartment of the handle.

4. The ratcheting tool as claimed in claim 3, wherein the protruded portion is integrally formed on an end edge of the top wall defining the compartment of the handle.

5. The ratcheting tool as claimed in claim 4, wherein the anchor is securely sandwiched between the protruded portion and a lateral wall defining the compartment of the handle.

6. The ratcheting tool as claimed in claim 3, wherein the protruded portion is integrally formed on an intermediate portion of the top wall defining the compartment of the handle.

7. The ratcheting tool as claimed in claim 6, wherein the anchor includes a groove defined in a top side thereof.

8. The ratcheting tool as claimed in claim 1, wherein the protruded portion is integrally formed on an intermediate portion of a bottom wall defining the compartment of the handle.

9. The ratcheting tool as claimed in claim 8, wherein the anchor includes a groove defined in an underside thereof.

10. The ratcheting tool as claimed in claim 1, with the anchor including a peg, with the pawl including a receptacle, and with the elastic element having a first end attached to the peg of the anchor and a second end mounted in the receptacle of the pawl.

11. The ratcheting tool as claimed in claim 1, with the anchor including a receptacle, with the pawl including a peg, and with the elastic element having a first end mounted in the receptacle of the anchor and a second end attached to the peg of the pawl.

12. The ratcheting tool as claimed in claim 1, with the anchor including a receptacle, with the pawl including a receptacle, and with the elastic element having a first end mounted in the receptacle of the anchor and a second end mounted in the receptacle of the pawl.